Quote:Hard to answer without knowing how you did it. There are two ways to create a backplane: adding a Free holon with a planez constructor, in which case you can set its distance and coloring as you like, or using the Depth window to turn a background picture into a flat depth map.

Sorry, this was made in the depth window; it occurs when using some vertical angle. It' s no problem because it looks fine but it was unintended.
Regards
Kaspar